\(a,-\dfrac{12}{16}-\left(\dfrac{3}{4}-x\right)=-\dfrac{5}{3}\)
\(\dfrac{3}{4}-x=-\dfrac{12}{16}-\left(-\dfrac{5}{3}\right)\)
\(\dfrac{3}{4}-x=\dfrac{11}{12}\)
\(x=\dfrac{3}{4}-\dfrac{11}{12}\)
\(x=-\dfrac{1}{6}\)
\(b,x-\dfrac{3}{7}:\dfrac{9}{14}=-\dfrac{7}{3}\)
\(x-\dfrac{3}{7}=-\dfrac{7}{3}\times\dfrac{9}{14}\)
\(x-\dfrac{3}{7}=-\dfrac{3}{2}\)
\(x=-\dfrac{3}{2}+\dfrac{3}{7}\)
\(x=-\dfrac{15}{14}\)
\(c,-\dfrac{3}{4}x+\dfrac{5}{8}x=\dfrac{1}{3}\)
\(\left(-\dfrac{3}{4}+\dfrac{5}{8}\right)x=\dfrac{1}{3}\)
\(-\dfrac{1}{8}x=\dfrac{1}{3}\)
\(x=\dfrac{1}{3}:\left(-\dfrac{1}{8}\right)\)
\(x=-\dfrac{8}{3}\)
`-12/16 - ( 3/4 - x ) = -5/3`
`=> 3/4 - x=-12/16 -(-5/3)`
`=> 3/4 - x=-12/16 +5/3`
`=> 3/4 - x=11/12`
`=> x= 3/4-11/12`
`=> x=9/12 -11/12`
`=> x=-1/6`
__
`x - 3/7 : 9/14 = - 7/3`
`=>x - 3/7=-7/3 xx 9/14`
`=>x - 3/7=-3/2`
`=>x= -3/2 + 3/7`
`=>x=-15/14`
__
`-3/4 x + 5/8 x =1/3`
`=> (-3/4 + 5/8) x =1/3`
`=> ( -6/8+ 5/8) x =1/3`
`=> -1/8 x=1/3`
`=>x= 1/3 : (-1/8)`
`=> x= 1/3 xx (-8)`
`=>x= -8/3`
